Yup, you will soon have to confirm your clicks on ads displayed in apps, if you don't already. Google has updated the way the ads work, so now if you click near the border of the ad, it will ask you to click again to confirm. This reduces false clickthroughs, reducing the amount advertisers have to pay.
Another benefit of removing false clicks is that the mobile ads see higher conversion rates, which make the ad pay-off for the advertiser more. This means Google can then charge more for the ad, which offsets the decline in revenue by charging for fewer clicks. The new confirmation will be in all in-app image banner ads.
"This is only the beginning. As devices continue to converge there will be new challenges in the fight against what many have called the 'fat finger' problem. But implementing confirmed clicks is an important step that we think will benefit users, advertisers, publishers, and the mobile ecosystem overall, and we'll continue to look for ways to improve mobile ads for everyone."